Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Burlington, Vermont to Sydney as you normally would.
Related info for your journey
Useful info, stats and facts about Burlington to Sydney flights.
Burlington Airport is BTV and Sydney Kingsford Smith Airport is SYD. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.